added nonce to form fields

git-svn-id: https://plugins.svn.wordpress.org/post-expirator/trunk@861607 b8457f37-d9ea-0310-8a92-e5e31aec5664
added form filtering

git-svn-id: https://plugins.svn.wordpress.org/post-expirator/trunk@861627 b8457f37-d9ea-0310-8a92-e5e31aec5664
new rev

git-svn-id: https://plugins.svn.wordpress.org/post-expirator/trunk@861630 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme

git-svn-id: https://plugins.svn.wordpress.org/post-expirator/trunk@861636 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed typo

git-svn-id: https://plugins.svn.wordpress.org/post-expirator/trunk@861803 b8457f37-d9ea-0310-8a92-e5e31aec5664
tweaked wording

git-svn-id: https://plugins.svn.wordpress.org/post-expirator/trunk@863249 b8457f37-d9ea-0310-8a92-e5e31aec5664